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Proceedings Paper

100-mK bolometric receiver for low-background astronomy
Author(s): S. T. Tanaka; Andre Clapp; Mark J. Devlin; Marc L. Fischer; Chris Hagmann; Andrew E. Lange; Paul L. Richards
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Paper Abstract

The design and construction of 100 mK composite bolometers for low background submillimeter and millimeter-wave astronomy are discussed. The bolometers are cooled to 100 mK using an adiabatic demagnetization refrigerator. The bolometers consist of a silicon substrate suspended by nylon fibers, a bismuth film absorber, a neutron transmutation doped germanium thermometer with graphite fiber electrical leads, and a brass wire thermal strap. Heated JFET amplifiers located on the 1.5 K cold plate are used to read out the bolometer signals. Electrically measured noise equivalent powers as low as 2 X 10-17 W/(root)Hz have been achieved.

Paper Details

Date Published: 20 October 1993
PDF: 6 pages
Proc. SPIE 1946, Infrared Detectors and Instrumentation, (20 October 1993); doi: 10.1117/12.158665
Show Author Affiliations
S. T. Tanaka, Univ. of California/Berkeley (United States)
Andre Clapp, Univ. of California/Berkeley (United States)
Mark J. Devlin, Univ. of California/Berkeley (United States)
Marc L. Fischer, Univ. of California/Berkeley (United States)
Chris Hagmann, Univ. of California/Berkeley (United States)
Andrew E. Lange, Univ. of California/Berkeley (United States)
Paul L. Richards, Univ. of California/Berkeley (United States)

Published in SPIE Proceedings Vol. 1946:
Infrared Detectors and Instrumentation
Albert M. Fowler, Editor(s)

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